MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7b33de62dafef125fe428afe47e9a353749a6632d58809ce428b7514886b49b6. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


RemcosRAT


Vendor detections: 15


Intelligence 15 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 7b33de62dafef125fe428afe47e9a353749a6632d58809ce428b7514886b49b6
SHA3-384 hash: 92de5e5ae247a0215c7ba2c8eb1577a9eb02c8c226675e247a48756f4c174a9ea6120b8bc9621c2e88f45b49e2cd1be6
SHA1 hash: 58d4ed5d5791401f4555d6278a179e5c65563c8a
MD5 hash: c7b4ec460b896ccd9f368467d06ee44b
humanhash: alpha-music-cardinal-purple
File name:na
Download: download sample
Signature RemcosRAT
Create hunting rule
File size:88'612 bytes
First seen:2024-10-12 15:08:20 UTC
Last seen:2024-10-12 15:33:25 UTC
File type:Rich Text Format (RTF) rtf
MIME type:text/rtf
ssdeep 768:t9QdTYkH9SFwul5U0mGL8ogS2fw6Vgr9JE:Mkkdzuglo8og3fJVmE
TLSH T1C583DF0D978F14A1CF50A273132A4E4982FCBB3EB70612B5759C83723BAD93D59A45BC
Magika rtf
Reporter abuse_ch
Tags:CVE-2017-11882 RemcosRAT rtf

Intelligence

File Origin
# of uploads :
2
# of downloads :
150
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
na
Verdict:
No threats detected
Analysis date:
2024-10-12 15:13:11 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/412d494d-d200-4658-8451-dfaa21a32bc2

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Sanesecurity.Shelter.Malware.BadRtf.ObjUpd.UNOFFICIAL
Create hunting rule

MiscreantPunch.RTF.2017-0199.Obfus.171711.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=670a91111d4ef219fa61a212
Tags:
Autorun Exploit Office Trojan
Result
Verdict:
Malicious
File Type:
RTF File
Link:
https://app.docguard.net/7b33de62dafef125fe428afe47e9a353749a6632d58809ce428b7514886b49b6/results/dashboard
Behaviour
BlacklistAPI detected
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/670a911f52fda0827375bbe3/reports/af698e37-3ef3-4947-b7c5-6d04d5f60e66/overview
Verdict:
Malicious
Labled as:
CVE-2017-11882
Link:
https://www.hybrid-analysis.com/sample/7b33de62dafef125fe428afe47e9a353749a6632d58809ce428b7514886b49b6
Result
Verdict:
MALICIOUS
Result
Threat name:
Remcos
Create hunting rule
Detection:
malicious
Classification:
phis.troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1532193
Signature
Binary is likely a compiled AutoIt script file
C2 URLs / IPs found in malware configuration
Detected Remcos RAT
Document exploit detected (process start blacklist hit)
Drops VBS files to the startup folder
Found malware configuration
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor establishes network connection
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Searches for Windows Mail specific files
Sigma detected: Drops script at startup location
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: Equation Editor Network Connection
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: Remcos
Sigma detected: Suspicious Binary In User Directory Spawned From Office Application
Sigma detected: Suspicious Microsoft Office Child Process
Sigma detected: WScript or CScript Dropper
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
System process connects to network (likely due to code injection or exploit)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Instant Messenger accounts or passwords
Tries to steal Mail credentials (via file / registry access)
Windows Scripting host queries suspicious COM object (likely to drop second stage)
Writes to foreign memory regions
Yara detected Remcos RAT
Yara detected UAC Bypass using CMSTP
Yara detected WebBrowserPassView password recovery tool
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1532193 Sample: na.rtf Startdate: 12/10/2024 Architecture: WINDOWS Score: 100 72 Suricata IDS alerts for network traffic 2->72 74 Found malware configuration 2->74 76 Malicious sample detected (through community Yara rule) 2->76 78 19 other signatures 2->78 10 WINWORD.EXE 291 13 2->10         started        13 wscript.exe 1 2->13         started        process3 file4 52 C:\Users\user\Desktop\~$na.rtf, data 10->52 dropped 16 EQNEDT32.EXE 12 10->16         started        21 EQNEDT32.EXE 10->21         started        112 Windows Scripting host queries suspicious COM object (likely to drop second stage) 13->112 23 name.exe 2 13->23         started        signatures5 process6 dnsIp7 56 104.168.7.25, 49163, 80 AS-COLOCROSSINGUS United States 16->56 46 C:\Users\user\AppData\Roaming\taskhostw.exe, PE32 16->46 dropped 48 C:\Users\user\AppData\...\taskhostw[1].exe, PE32 16->48 dropped 80 Office equation editor establishes network connection 16->80 82 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 16->82 25 taskhostw.exe 6 16->25         started        84 Binary is likely a compiled AutoIt script file 23->84 86 Writes to foreign memory regions 23->86 88 Maps a DLL or memory area into another process 23->88 29 svchost.exe 23->29         started        file8 signatures9 process10 file11 50 C:\Users\user\AppData\Local\...\name.exe, PE32 25->50 dropped 104 Multi AV Scanner detection for dropped file 25->104 106 Binary is likely a compiled AutoIt script file 25->106 108 Machine Learning detection for dropped file 25->108 31 name.exe 3 25->31         started        110 Detected Remcos RAT 29->110 signatures12 process13 file14 54 C:\Users\user\AppData\Roaming\...\name.vbs, data 31->54 dropped 64 Multi AV Scanner detection for dropped file 31->64 66 Binary is likely a compiled AutoIt script file 31->66 68 Machine Learning detection for dropped file 31->68 70 4 other signatures 31->70 35 svchost.exe 3 10 31->35         started        signatures15 process16 dnsIp17 58 geoplugin.net 35->58 60 geoplugin.net 178.237.33.50, 49165, 80 ATOM86-ASATOM86NL Netherlands 35->60 62 107.173.4.16, 2404, 49164, 49166 AS-COLOCROSSINGUS United States 35->62 90 System process connects to network (likely due to code injection or exploit) 35->90 92 Detected Remcos RAT 35->92 94 Maps a DLL or memory area into another process 35->94 39 svchost.exe 1 35->39         started        42 svchost.exe 1 35->42         started        44 svchost.exe 11 35->44         started        signatures18 process19 signatures20 96 Tries to steal Instant Messenger accounts or passwords 39->96 98 Tries to steal Mail credentials (via file / registry access) 39->98 100 Searches for Windows Mail specific files 39->100 102 Tries to harvest and steal browser information (history, passwords, etc) 42->102
Score:
100%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/7b33de62dafef125fe428afe47e9a353749a6632d58809ce428b7514886b49b6
Detection:
remcos
Create hunting rule
Link:
https://mwdb.cert.pl/sample/7b33de62dafef125fe428afe47e9a353749a6632d58809ce428b7514886b49b6/
Threat name:
Document-RTF.Exploit.CVE-2017-11882
Create hunting rule
Status:
Malicious
First seen:
2024-10-12 15:09:16 UTC
File Type:
Document
Extracted files:
4
AV detection:
15 of 24 (62.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=pmz54yw273ysl7scrl7ep2ndkn2juzrs2weattscrn2rjcdljg3a._file
Verdict:
malicious
Label(s):
unknown_loader_036
Create hunting rule
remcos
Create hunting rule
Similar samples:
error
RemcosRAT
Result
Malware family:
remcos
Create hunting rule
Score:
  10/10
Tags:
family:remcos botnet:newest collection discovery rat
Link:
https://tria.ge/reports/241012-sjhl5awhla/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
AutoIT Executable
Suspicious use of SetThreadContext
Accesses Microsoft Outlook accounts
Drops startup file
Executes dropped EXE
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Detected Nirsoft tools
NirSoft MailPassView
NirSoft WebBrowserPassView
Remcos
Malware Config
C2 Extraction:
107.173.4.16:2404
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/b04a297e-067c-4250-a093-f124924d4422
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/7b33de62dafef125fe428afe47e9a353749a6632d58809ce428b7514886b49b6

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:SUSP_INDICATOR_RTF_MalVer_Objects
Create hunting rule
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embedding one of the object mostly observed in exploit (e.g. CVE-2017-11882) documents.
Reference:https://github.com/ditekshen/detection

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

RemcosRAT

Rich Text Format (RTF) rtf 7b33de62dafef125fe428afe47e9a353749a6632d58809ce428b7514886b49b6

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3231627/
  
Delivery method
Distributed via web download

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